Transmitter-cut-out device.



P. O. SCHULZ.

TRANSMITTER CUT-OUT DEVICE.

APPLICATION FILED APR-27. I9l6.

l,%6,3@9.. Patented May15,1917.

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SENT @FFlltlEt PAUL o. SCHULZ, or BOYD, MINNESOTA.

TRANSMITTER-CUT-OUT DEVICE.

Specification of Letters Patent.

Patented May 15, 1917.

I Application filed April 27, 1916. Serial No. 93,960.

To all whom it may concern.

Be it known that 1, PAUL O. SoHULz, a citizen of the United States, residing at Boyd, in the county of Lac qui Parle, State of Minnesota, have invented certain new and useful Improvements in Transmitter-Cut- Out Devices; and I do hereby declare the 7 following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use .the same.

This invention relates to a transmitter cut-out device forparty line telephones.

The object of the invention is to provide a device through the instrumentality of which the movement of the receiver arm may be limited when the receiver is removed so that the line spring and the receiver spring will only contact thereby cutting out the" transmitter and enabling a party to listen to another conversation without the noises surrounding the listening party being transmitted through the telephone system and at the same time resulting in a saving in respect to the batteries of the system.

A further object of the invention is to provide a device of the character named which will be simple in construction, cheap to manufacture and easily applied to any telephone without the necessity of any reorganization of its parts.

With the above and other objects in view the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully described and particularly pointed out in the appended claim.

In describing the invention in detail reference will be had to the accompanying drawings wherein like characters of reference denote corresponding parts in the several views, and in which Figure 1 is a vertical section through a fragment of a telephone embodying the invention and disclosing the receiver arm and the receiver arm switch with the parts of the latter in th position they would occupy when the receiver is on its arm or hook and the telephone entirely out of use;

Fig. 2, a view similar to Fig. 1 with the receiver removed from its hook and the latter held in position by the cut-out device to permit only the line spring and the receiver spring to contact in which position of the parts the transmitter is cut-out but the party is free to listen to a conversation on the line;

F ig. 3, a view similar to Fig. 1 with the parts in the position they would occupy when the receiver is removed from the hook and the latter in position to operate the switch to permit both the transmission and receiving of messages over the line, and

Fig. 4-, a fragmental perspective view with the receiver hook held in position by the invention to cut out the transmitter.

Referring to the drawings 10 indicates the body case of the telephone, 11 the receiver hook, and 12 the receiver. The usual switch which is operated by the movement of the receiver hook 11 is indicated at A and embodies the insulating block 13, transmission spring let, receiver spring 15, and line spring 16. The spring 16 is disposed lowermost and has its free end connected to the hook 11 by a link 17 whereby the full movement of the hook 11 after the receiver is removed will result in the springs 14, 15 and 16 being operated into contact and thus es tablish the proper status for transmitting and receiving messages over the line.

The invention proper which is designed to maintain the transmitter cut out while it is possible to receive messages over the line comprises a bracket 18 secured to the body 1.0 and having pivotally hung thereon an arm 19 disposed above and in the plane of movement of the hook 11. The arm 19 is provided at its upper end with an outward extension 20 disposed at substantially right angles to the arm and formed by bending such an extension around the pivot pin of the bracket 18.

Assuming the parts to be in the position shown in Fig. 1 it will be obvious that if the receiver 12 is removed without engaging the latter with the extension 20 the hook 11 will move upwardly under the influence of its spring 21 until said hook engages the free end of the arm 19. Such a status is shown in Fig. 2 wherein the line spring 16 is in contact with the receiver spring 15. With the parts in this position it will be apparent that while the receiver is rendered active the transmitter remains cut out so that a party can listen to messages passing over the line without the noises surrounding the party being transmitted to the line. 7

If it is desired to talk over the telephone in the usual way the receiver 12, in removing same from the hook, is engaged with the extension 20 and the parts thereby operated to the position shown in Fig. 3. It will be 7 by the hook Whenthe receiver is removed therefrom to limit movement of the hook so 7 Copies of this patent may be obtained for five centsieaeh,byfad'dressing the fcommissioner (51 fetehts, 7

that only'thereceiver spring of thes'witch will. he engaged by the line spring of the switch, and an extension on said arm engageable by'the'receiver; during removal of position to permit full movement of the receiver hook as therecelver 1s removed.

In testimony whereof-, I afhx my slgnature, lll'illle PlfGSGHQO Of't-WO WHIIGSSGS.

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Washington, D. 0.? p j p the latter from the hook to trip the arm to a V PAULoeoHU'Lz. V 

